What does this quote mean?

“Dressler coolly explores this American dream in all its manifestation as aim, vision, intention, nightmare, hallucination, delusion, death. The great city—and extension America, with its evermore exotic immigrants, its evermore hyperbolic advertising ,its voracious ambition, its headlong rush into the 20th century a fever patient in a hospital, thrashing in its sleeps, erupting in modern dreams.“(